APA (7th ed.) Citation

Clarke, J. F. (2014). Nineteenth Century Questions. Project Gutenberg.

Chicago Style (17th ed.) Citation

Clarke, James Freeman. Nineteenth Century Questions. Project Gutenberg, 2014.

MLA (9th ed.) Citation

Clarke, James Freeman. Nineteenth Century Questions. Project Gutenberg, 2014.

Warning: These citations may not always be 100% accurate.